Howlett Machine Works was established in 1921, and has been involved in the manufacturing of a wide variety of components for the construction industry for more than 40 years. They have held more than 25 patents in the U.S. Howlett's developments include: The Howlett Grip Nut Anchorage and The Howlett Grip Coupler for bar Tendons ( 1957 ) ; The Howlett Custom Drive Transmission ( 1960 ) ; The...